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| author | Linux Build Service Account <lnxbuild@quicinc.com> | 2017-05-03 23:32:09 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-05-03 23:32:08 -0700 |
| commit | 6669dae7d1943930d5be356dddd5fdb733339fb4 (patch) | |
| tree | c676256528b27f64d2a0f32a85d666e8c3d79203 | |
| parent | a1e1d01429ac1fb8cc68c546a82a220b77ca4dd7 (diff) | |
| parent | 84f8c42e5d848b1d04f49d253f98296e8c2280b9 (diff) | |
Merge "msm: camera: Allow driver file to be opend only once."
| -rw-r--r-- | drivers/media/platform/msm/camera_v2/msm.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/media/platform/msm/camera_v2/msm.c b/drivers/media/platform/msm/camera_v2/msm.c index 8596366a70f0..f95cc37f5c2c 100644 --- a/drivers/media/platform/msm/camera_v2/msm.c +++ b/drivers/media/platform/msm/camera_v2/msm.c @@ -1015,11 +1015,9 @@ static int msm_open(struct file *filep) BUG_ON(!pvdev); /* !!! only ONE open is allowed !!! */ - if (atomic_read(&pvdev->opened)) + if (atomic_cmpxchg(&pvdev->opened, 0, 1)) return -EBUSY; - atomic_set(&pvdev->opened, 1); - spin_lock_irqsave(&msm_pid_lock, flags); msm_pid = get_pid(task_pid(current)); spin_unlock_irqrestore(&msm_pid_lock, flags); |